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TitleStructure of the human mTOR complex I and its implications for rapamycin inhibition.
Journal, issue, pagesMol Cell, Vol. 38, Issue 5, Page 768-774, Year 2010
Publish dateJun 11, 2010
AuthorsCalvin K Yip / Kazuyoshi Murata / Thomas Walz / David M Sabatini / Seong A Kang /
PubMed AbstractThe mammalian target of rapamycin complex 1 (mTORC1) regulates cell growth in response to the nutrient and energy status of the cell, and its deregulation is common in human cancers. Little is known ...The mammalian target of rapamycin complex 1 (mTORC1) regulates cell growth in response to the nutrient and energy status of the cell, and its deregulation is common in human cancers. Little is known about the overall architecture and subunit organization of this essential signaling complex. We have determined the three-dimensional (3D) structure of the fully assembled human mTORC1 by cryo-electron microscopy (cryo-EM). Our analyses reveal that mTORC1 is an obligate dimer with an overall rhomboid shape and a central cavity. The dimeric interfaces are formed by interlocking interactions between the mTOR and raptor subunits. Extended incubation with FKBP12-rapamycin compromises the structural integrity of mTORC1 in a stepwise manner, leading us to propose a model in which rapamycin inhibits mTORC1-mediated phosphorylation of 4E-BP1 and S6K1 through different mechanisms.
External linksMol Cell / PubMed:20542007 / PubMed Central
MethodsEM (single particle)
Resolution26.0 - 28.0 Å
Structure data

EMDB-5197:
Cryo-EM reconstruction of human mTORC1
Method: EM (single particle) / Resolution: 26.0 Å

EMDB-5198:
3D reconstruction of negatively stained human raptor
Method: EM (single particle) / Resolution: 28.0 Å

Source
  • Homo sapiens (human)

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